'Wasted' WiFi signals can power small devices

Researchers have developed a way to harvest energy from WiFi signals to power small devices.
The amount of WiFi sources to transmit information wirelessly between devices has grown exponentially. This results in the widespread use of the 2.4GHz radio frequency that WiFi uses, with excess signals available to be tapped for alternative uses.
To harness this under-utilized source of energy, researchers developed a technology that uses tiny smart devices known as spin-torque oscillators (STOs) to harvest and convert wireless radio frequencies into energy to power small electronics.
In their new study, the researchers successfully harvested energy using WiFi-band signals to power a light-emitting diode (LED) wirelessly, without using any battery.

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Raghav Sharma , Yang Hyunsoo , Nature Communications , National University Of Singapore , Japan Tohoku University , National University , ராகவ் ஷர்மா , இயற்கை தகவல்தொடர்புகள் , தேசிய பல்கலைக்கழகம் ஆஃப் சிங்கப்பூர் , ஜப்பான் தோஹோக்கு பல்கலைக்கழகம் , தேசிய பல்கலைக்கழகம் ,